This is a sole-source RFP to add parts for the Improved Bradley Acquisition Subsystem (IBAS) to an existing umbrella contract for three ordering periods, ideally from Fiscal Year 2026 through 2028. The government requests firm-fixed pricing for these three years and requires a detailed cost/price proposal with extensive supporting documentation, including subcontractor analyses and indirect rate justifications. The performance of services location is not specified. Key requirements include addressing organizational conflicts of interest, submitting a subcontracting plan, and preparing for potential First Article and Production Lot Testing. Proposals must be submitted electronically, and all communications must go directly to the identified DLA contracting personnel.